Okay...lesson One. Bounce flash. Flash on-camera in the hotshoe, but set to bounce off of a large surface that is neutral in color..white, or gray, or black. Set the White Balance on the camera to Flash. (Don't you have tangerine walls? Hang up a white sheet, or a piece of white poster board, or have an assistant hold the bounce board for you).
Use the flash that bounces off of a wall, or a refrigerator, or a white door, to create a BIG light source that models the subjects. Since you have an SB 700, a mid-power higher end flash, you have enough power to get f/8 or so at ISO 640 on an indoor bounce. Set the flash head to a ZOOM setting of 50,70,or 85mm, for a normal room bounce. In a BIG room, or on a long throw, zoom the flash head to maximum telephoto.
You can bounce off a wall, or a sheet, or a foamcore board (poster board from Office Depot, for example), or a refrigerator, or a gray wall, or whatever, and get soft, fairly even lighting. Sometimes it's best to side-bounce, or back-and-to-the-side a bit; a straight overhead bounce can give dark 'raccoon eyes', so consider how the light is bouncing. Aim the flash head so it hits the bounce surface about mid-way between the camera and the subject, more or less.
Bounce the light, and LOOK closely at how it hits...re-aim the flash...shoot some more tests...you will find that the SB-700 will perform best at ISO 400, or 500, or 640 when bouncing the flash and using smaller, "portrait" f/stops which are like f/8 or f/7.1 with more than one person in the shot. Bounce flash can look ***gorgeous*** when fired off of some of the complex surfaces that newer homes have, like little alcoves, or whirlpool baths, or window-seat nooks, and so on. But it does take some practice in learning where to put the people, and where to aim the flash to get a good, workable, appropriate bounce.